data fw13p05; title 'Chapter 13, Exercise 5, Mineral Loss';
input  OBS    CONTROL    TREATED     DIFF;
cards;
1       66.1       59.1      -7.0
2       79.3       58.9     -20.4
3       55.3       55.0      -0.3
4       68.8       65.9      -2.9
5       57.8       54.1      -3.7
6       71.8       69.0      -2.8
7       81.3       60.2     -21.1
8       54.0       55.5       1.5